startup

a=peripheral.wrap("top")
a.clear()
a.setTextColor(colors.green)
a.setTextScale(1)
function b(c)
return math.floor(c+0.5)
end
d=" <- Magic Shop"
z="      Science Shop ->"
e=4
f,g=a.getSize()
f=b(f/e)
g=b(g/e)
a.setTextScale(e-1)
a.setCursorPos(b(f/2)-b(d:len()/2),b(g/4))
a.write(d)
a.setCursorPos(b(f/2)-b(z:len()/2),b(g/2))
a.write(z)